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Line 43: return float(sum(g))/len(g) #in Python 3.0 the cast to float will no longer be necessary </source> Python hides essentially all of the details using the [~~http~~https://www.python.org/doc/lib/typeiter.html iterator protocol]. Confusingly, [[Design Patterns]] uses "aggregate" to refer to the blank in the code <code>for x in ___:</code> which is unrelated to the term "aggregation".<ref>[[Design Patterns]], p. 22: "Aggregation implies that one object owns or is responsible for another object. ... Aggregation implies that an aggregate object and its owner have identical lifetimes."</ref> Neither of these terms refer to the statistical aggregation of data such as the act of adding up the Fibonacci sequence or taking the average of a list of numbers. == See also ==

Aggregate pattern: Difference between revisions